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JBL杰士专业影院音箱的比较
Specifications:
Frequency Range (-10 dB): 35 Hz - 16 kHz
Frequency Response (± 3 dB): 45 Hz - 12.5 kHz
Hor. Coverage Angle (-6 dB): 80°, averaged 300 Hz to 16 kHz
Vert. Coverage Angle (-6 dB): 45°, averaged 300 Hz to 16 kHz
Directivity Factor (Q): 10.4
Directivity Index (DI): 11
Maximum peak output (1 m): LF: 142.8 dB, MF: 140 dB, HF: 136.8 dB
Recommended Crossover Freq. LF/MF: 297 Hz, MF/HF: 2.5 kHz
Recommended Controller: JBL DSC family of digital controllers; tunings available
in memory
Dimensions (HxWxD): 2895.6 mm x 1118 mm x 812.8 mm
(114 in. x 44 in. x 34 in.)
Net Weight: 171.69 kg (378.5 lbs.)
Shipping Weight: 190.5 kg (420 lbs.)
Transducers:
Model 5644 Low Frequency: Four 2226H 380 mm (15 in.) dia., 100 mm (4 in.)
edgewound ribbon voice coil mounted in
5504 LF enclosure in DiamondQuad driver array
Nominal impedance: Each pair in parallel; 4 ohm loads per driver pair
Input Power Rating: 2400 W, AES; two channels of 1200 W Recommended
Amplifier per driver pair
Sensitivity: 103 dB, 1 W @ 1 m (3.3 ft.)
Input Connectors: Barrier Strip
Dimensions (HxWxD): 1118 mm x 1118 mm x 623 mm
(44 in. x 44 in. x 24.5 in.)
Net Weight: 136 kg (300 lbs.)
Shipping Weight: 145.2 kg (320 lbs.)
Model 5674-19/HF Mid Frequency: 2392 midrange horn
2490H midrange driver; 100 mm (4 in.) edgewound
ribbon voice coil
Nominal impedance: 8 Ohms
Input Power Rating: 100 W, AES; 300 W Recommended Amplifier
Sensitivity: 114 dB, 1 W @ 1 m (3.3 ft.)
Net Weight: 28.35 kg (62.5 lbs.)
High Frequency: 2352 midrange horn
2451H midrange driver; 100 mm (4 in.) edgewound
ribbon voice coil
Nominal impedance: 8 Ohms
Input Power Rating: 75 W, AES; 200 W Recommended Amplifier
Sensitivity: 112 dB, 1 W @ 1 m (3.3 ft.)
Net Weight: 7.26 kg (16 lbs.)
Mounting Accessories: HF horn baffle board and mounting frame which
couples MF and HF; mounts to LF enclosure for
aiming/tilting
S P E C I F I C A T I O N S
FREQUENCY RESPONSE1 40Hz-19kHz ± 3dB, -10dB @ 35Hz
RECOMMENDED AMP. POWER LF: KPT-MWM-LF - 400 watts cont. /
1600 watts peak per woofer
MB: KPT-XII-MB - 250 watts cont. /
1000 watts peak
MF: KPT-402-MF - 50 watts cont. /
200 watts peak
HF: KPT-Grand HF-T - 50 watts cont. /
200 watts peak
SYSTEM COMPONENTS/ LF: KPT-MWM-LF – 400 watts/driver (49V)
POWER HANDLING2 MB: KPT-XII-MB – 250 watts (42V)
MF: KPT-402-MF – 50 watts (20V)
HF: KPT-GRAND-HF-T – 50 watts (50V)
CROSSOVER POINTS 300Hz, 800Hz, 8kHz
DELAY: QUAD-AMP LF- 0ms
CONFIGURATION MB- 5.35ms
MF- 5.38ms
HF- 6.38 ms
CROSSOVER SLOPE 24dB/Octave
SENSITIVITY3 108dB
COVERAGE HORIZONTAL 80°± 20° 200Hz-16kHz
VERTICAL 50°± 30° 350Hz-16kHz
HEIGHT 98" (249cm)
WIDTH 67.25" (170.8cm)
DEPTH 45" (114.3cm)
WEIGHT 531 lbs. (241.6kg)
两个都来自官方的文档。目前来看,这2个型号应该是各自的顶级专业电影院型号
从扬声器单元来说,差别是很明显的
5674是3分频,
如果从单元参数看,5674
2226H 低音驱动器 2400W 103db
100mm中低音驱动器2490H+2392 100W 114db
38mm高音驱动器2451H+2352 75W 112db
峰值声压 低音142.8db,中音140db,高音136.8db
分频点297Hz 2.5kHz
mcm4t是4分频,由于杰士网上资料不全,更详细的参数没查到
低音 KPT-MWM-LF – 400 w
中低音: KPT-XII-MB – 250 w
中高音: KPT-402-MF – 50 w
高音: KPT-GRAND-HF-T – 50 w
分频点300Hz , 800Hz ,8kHz
从驱动器来说,JBL的参数更强,杰士需要箱体设计和多路喇叭弥补单元的弱点
针对两者的比较,JBL和杰士比较的弱点:指向和高频上限
中高音部分实际上指向性是可设计的,所配号筒不同可获得不同指向性
而高频上限频率,可以去参考2451H的文档,实际上是有20K的,这里没设计那么高,原因也很简单,电影院没这个必要,满足THX的X环特性并经过THX认证就是最好的说明。
还有两者的声压部分,既然是声学系的,给出一个mcm4t 128db的最高声压是针对哪个部分的声压??
5674的参数是低音142.8db,中音140db,高音136.8db
杰士的技术水平还是远远不如JBL的,至少是扬声器单元的技术
而号筒的设计与JBL各有千秋
[ 本帖最后由 发烧家庭影院 于 2008-10-18 20:53 编辑 ] |
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